Length of service engine piston rings
depends largely on the quality of used fuel and lubricants
materials and general operating conditions.
An indication of the need to check or replace the piston rings
a high flow (waste) oil engine:
more than 200 g per 100 kilometers. It must be remembered that
delayed replacement of piston rings leads to an increased
wall cylinder liners wear. This is
increase in oil consumption, increases in the carbonization
the walls of the combustion chambers to spark plugs, resulting in
engine power is reduced and increased operational
To check the engine piston rings must
be partially disassembled and pistons with rings removed. Check
state and burnishing of piston rings, there are no premature
wear of cylinder liners and engine are not blocked or whether carbon
resinous deposits in the slot
Before checking the piston rings, thoroughly clean the soot from their
and tar deposits. If the external inspection of piston
rings on the outer cylindrical surface will be
detected with a cylinder neprirabotavshiesya sites such
ring, replace with new ones.
Check the piston rings for compliance with technical requirements
produce the parameters specified
in Table 3.
If the test is found that the rings on the parameters
are below the allowable limits, then these rings should be replaced
Clearance in the lock ring is expedient measure, placing a ring in
that the pocket in which it worked. At the same ring
You must have a sleeve at a distance of 20-30 mm from the bottom
the end. The length of the ring to properly install
pushed into the sleeve by means of the piston head used
As the mandrel. Elasticity is measured on the piston rings
special scales with a flexible tape covering the ring.
When checking the condition and the wear of piston rings
may be necessary to replace only one of the upper
compression rings, as the rest of the ring worn out
the engine is considerably smaller.
WARNING! Do not install the pistons with new upper
chrome rings. These rings, which have
hard outer surface to be very slow
burnished to a surface of the cylinder liner. It is for this
because of repair kits rings are available in nominal sizes
nehromirovannymi upper rings.
It is recommended in all cases, disassembly of the engine after
60 000 km mileage replaced the piston rings. This is the one
hand, eliminates the need for disassembly povtornooy
the engine in case of wear of piston rings for further exploitation
car, on the other side will be for the prevention of
improve the overall engine life.
Proper positioning of piston rings in the grooves of the piston shown
in Fig. 29.
If the cylinder liners have minor wear and no
need repair, instead of the old rings can be used
maintenance of the nominal size of the ring. Repair of the nominal ring
size is acceptable to use, if the gap in the castle rings are inserted
the cylinder does noxtexceed 0.75 mm.
Otherwise, we must replace the worn liners with new ones.